org.dishevelled.matrix.io.impl

Class AbstractMatrix2DReader<E>

java.lang.Object

org.dishevelled.matrix.io.impl.AbstractMatrix2DReader<E>

Type Parameters:

E - 2D matrix element type

All Implemented Interfaces:

Matrix2DReader<E>

Direct Known Subclasses:

AbstractMatrixMarketReader, AbstractTextMatrix2DReader

public abstract class AbstractMatrix2DReader<E>
extends Object
implements Matrix2DReader<E>

Abstract reader for matrices of objects in two dimensions.

Version:

$Revision$ $Date$

Author:

Michael Heuer

Constructor Summary

Constructors

Constructor and Description
AbstractMatrix2DReader()

Method Summary

Methods

Modifier and Type	Method and Description
protected abstract Matrix2D<E>	createMatrix2D(long rows, long columns, int cardinality) Create and return a new instance of an implementation of Matrix2D.
protected abstract E	parse(String value) Parse the specified value to an instance of type E.
Matrix2D<E>	read(File file) Read a 2D matrix from the specified file.
Matrix2D<E>	read(URL url) Read a 2D matrix from the specified URL.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.dishevelled.matrix.io.Matrix2DReader

read

Constructor Detail

AbstractMatrix2DReader

public AbstractMatrix2DReader()

Method Detail

parse

protected abstract E parse(String value)
                    throws IOException

Parse the specified value to an instance of type E.

Parameters:

value - value to parse

Returns:

an instance of type E

Throws:

IOException - if an IO error occurs

createMatrix2D

protected abstract Matrix2D<E> createMatrix2D(long rows,
                         long columns,
                         int cardinality)

Create and return a new instance of an implementation of Matrix2D.

Parameters:

rows - number of rows

columns - number of columns

cardinality - approximate cardinality

Returns:

a new instance of an implementation of Matrix2D

read

public final Matrix2D<E> read(File file)
                       throws IOException

Read a 2D matrix from the specified file.

Specified by:

read in interface Matrix2DReader<E>

Parameters:

file - file to read from, must not be null

Returns:

a 2D matrix read from the specified file

Throws:

IOException - if an IO error occurs

read

public final Matrix2D<E> read(URL url)
                       throws IOException

Read a 2D matrix from the specified URL.

Specified by:

read in interface Matrix2DReader<E>

Parameters:

url - URL to read from, must not be null

Returns:

a 2D matrix read from the specified URL

Throws:

IOException - if an IO error occurs